linux-kernel - Re: [PATCH 1/8] crypto: ux500/hash - Prepare clock before enabling it

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAPDyKFrJsGhB9yRtF2a09Ob5_4Jz-gaBQxeuriCGaXqYwkSyeg@mail.gmail.com>
Date:	Wed, 8 May 2013 15:57:26 +0200
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	arnd@...db.de, linus.walleij@...ricsson.com,
	srinidhi.kasagar@...ricsson.com,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	Andreas Westin <andreas.westin@...ricsson.com>,
	linux-crypto@...r.kernel.org
Subject: Re: [PATCH 1/8] crypto: ux500/hash - Prepare clock before enabling it

On 2 May 2013 12:49, Lee Jones <lee.jones@...aro.org> wrote:
> If we fail to prepare the ux500-hash clock before enabling it the
> platform will fail to boot. Here we insure this happens.
>
> Cc: Herbert Xu <herbert@...dor.apana.org.au>
> Cc: David S. Miller <davem@...emloft.net>
> Cc: Andreas Westin <andreas.westin@...ricsson.com>
> Cc: Ulf Hansson <ulf.hansson@...aro.org>
> Cc: linux-crypto@...r.kernel.org
> Acked-by: Arnd Bergmann <arnd@...db.de>
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> ---
>  drivers/crypto/ux500/hash/hash_core.c |   12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/crypto/ux500/hash/hash_core.c b/drivers/crypto/ux500/hash/hash_core.c
> index 632c333..1e8b2f3 100644
> --- a/drivers/crypto/ux500/hash/hash_core.c
> +++ b/drivers/crypto/ux500/hash/hash_core.c
> @@ -1727,11 +1727,17 @@ static int ux500_hash_probe(struct platform_device *pdev)
>                 goto out_regulator;
>         }
>
> +       ret = clk_prepare(device_data->clk);
> +       if (ret) {
> +               dev_err(dev, "[%s] clk_prepare() failed!", __func__);
> +               goto out_clk;
> +       }
> +
>         /* Enable device power (and clock) */
>         ret = hash_enable_power(device_data, false);
>         if (ret) {
>                 dev_err(dev, "[%s]: hash_enable_power() failed!", __func__);
> -               goto out_clk;
> +               goto out_clk_unprepare;
>         }
>
>         ret = hash_check_hw(device_data);
> @@ -1763,6 +1769,9 @@ static int ux500_hash_probe(struct platform_device *pdev)
>  out_power:
>         hash_disable_power(device_data, false);
>
> +out_clk_unprepare:
> +       clk_unprepare(device_data->clk);
> +
>  out_clk:
>         clk_put(device_data->clk);
>
> @@ -1827,6 +1836,7 @@ static int ux500_hash_remove(struct platform_device *pdev)
>                 dev_err(dev, "[%s]: hash_disable_power() failed",
>                         __func__);
>
> +       clk_unprepare(device_data->clk);
>         clk_put(device_data->clk);
>         regulator_put(device_data->regulator);
>
> --
> 1.7.10.4
>

Acked-by: Ulf Hansson <ulf.hansson@...aro.org>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/